12923Kyushu University, Fukuoka, Japan.
Perception. 2023 Mar;52(3):183-194. doi: 10.1177/03010066221145320. Epub 2023 Jan 3.
In biological motion perception, movements of several point lights can evoke a vivid impression of living animals, including humans. Recent studies have reported that male point-light walkers tend to be perceived as facing toward the viewer more than female walkers, and have hypothesized that the gender-based facing bias arises from motion signals. The purpose of this study was to test this hypothesis under experimental conditions where binocular disparity was added to biological motion stimuli. In the two experiments reported here, participants were presented with disparity-defined female and male point-light figures facing toward or away from the viewer. In Experiment 1, we measured "facing-the-viewer" responses in upright and inverted walker configurations. It was found that the facing bias was greater for the male walker than for the female walker in most disparity magnitudes, regardless of walker inversion. In Experiment 2, the walker stimuli were replaced by static snapshots of the walkers. The results showed that the facing bias did not differ between the female and male static figures. These results suggest that motion signals play an important role in producing the gender-based facing bias, even when binocular disparity is added to biological motion stimuli.
在生物运动知觉中，几个点光源的运动可以唤起生动的活体动物（包括人类）的印象。最近的研究报告称，男性点光源步行者比女性步行者更容易被感知为面向观察者，并且假设这种基于性别的面向偏差是由运动信号引起的。本研究的目的是在向生物运动刺激添加双目视差的实验条件下测试这一假设。在本文报道的两个实验中，参与者被呈现出面向或背向观察者的具有双目视差定义的女性和男性点光源人物。在实验 1 中，我们测量了直立和倒立步行者配置中的“面向观察者”反应。结果发现，无论步行者是否倒立，男性步行者的面向偏差都大于女性步行者，在大多数视差大小下都是如此。在实验 2 中，步行者刺激被步行者的静态快照所取代。结果表明，女性和男性静态人物之间的面向偏差没有差异。这些结果表明，即使向生物运动刺激添加双目视差，运动信号也在产生基于性别的面向偏差方面发挥着重要作用。
